Air scavenging and charging blower for engines



June 17, 1930. E. KLINGELFUS S ET AL 1,763,791

AIR SCAVENGING AND CHARGING BLOWER FOR ENGINES Filed Feb. 26, 1925 2 Sheets-Sheet l hafijS Z? Zzzlzzge Zfass Jline 1930- E. KLINGELFUSS ETAL 1,753,791

AIR SCAVENGING AND CHARGING BLOWER FOR ENGINES Filed Feb. 26, 1925 2 Shoets Shoot 2,

JCZAB Patented June 17, 1930 UNITED STATES PATENT OFFECE" EMIL KLINGELFUSS AND ADOLF BAUMANN, 0F BADEN, SWITZERLAND, ASSIGNORS 'IO AKTIENGESELLSCHAFT BROWN, BOVERI AND CIE, OF BADEN, SWITZERLAND AIR SCAVENGEZNG AND CHARGING BLO'WEB FOR EllG-INES Application filed. February 26, 1925, Serial No. 11,901, and in Switzerland March 15, 1924.

Ships Diesel engines have recently been furnished as a rule with turbo-blowers for the scavenging of two-stroke cycle engines or for the charging blower of four-stroke cycle engines. This construction requires less space with less weight. In the case of submarines, turbo-blowers are employed further for blowing out the ballast tanks.

The present invention effects a further saving in space and weight, because the same blower is employed for scavenging or charging the engines, as well as for blowing out the tanks. As a rule a submarine is furnished with two Diesel engines having each a scavenging or charging blower. This arrangement allows of connecting the two blowers to gether in series for working upon the tanks. This manner of working contributes less air, but about twice the pressure required for the scavenging or charging of Diesel engines. It is therefore possible to attain the desired pressure by series-connection of the blowers.

In the accompanying drawings 1-- Figure 1 illustrates by way of example the pressure-volume curves of two blowers in the case of series-connection and parallel connection. The full lines show for two speeds of rotation, n and 71?, the pressure-volume characteristic of one blower alone, whilst the dotted curves a and n represent the pressure-volume characteristics for the two blowers operating in seriesconnection. Thus, for instance, in working for air scavenging purposes, each of the two blowers can deliver a volume a, that is to say 2?) for the two together when connected in parallel; and, for blowing out tanks with the blowers connected in series, about half the volume of e, that is to say,

.of blower b. For blowing out the tanks T,

the two blowers a and Z) are connected in seber.

ries, and therefore the valves 0 and g are closed, and the valves 7i and i are opened, so that the blower a delivers into the blower 7), so that the non-return flap valve it closes, and blower Z) delivers into tanks T. With this arrangement it is also possible to work crosswise, as in the case one of the Diesel engines or one of the blower motors being thrown out of operation. With valves hi and 9 closed and e and f open, the blower a can work on the Diesel engine I), or with valvesi and a closed and e and (Z open, the blower b can work on the Diesel engine a.

These various connections require, according to Figure 2 seven slide valves and one non-return flap valve. With special changeover devices it is possibleto reduce this num- For example Figures 3 and i illustrate the same possibilities oi": connection with only four change-over flap valves and one nonreturn flap valve. Figure 3 illustrates the working of the two blowers in parallel on the respective Diesel engines, whilst Figure l.

illustrates the series-connection forblowing out the tanks.

It is even possible to perform all the functions with a single change-over device as illustrated in Figures 5 to 8. NVith the connection shown in Figure 5 the two Diesel engines are served by the blowers a and b in parallel, the connections to lines I and 1 being .closed. Figure 6 illustrates the valve position for connection of lower a on Diesel engine b, and Figure 7 shows the position for connection of blower Z) on Diesel engine a, connections between the active blower and lines If and it, as well as to the non-workin blower in each instance being closed by the single change-over device.

VViththe setting shown in Figure 8, the blowers work in series on the tank, andthe Diesel connections a? and e are closed.

For adapting the blowers to the air delivery requirements for working the tanks. the blowers may be provided in the usual manner with the various known regulating devices such as for instance, a speed-regulating device, a relief valve or movable guide blades. As an. example of this latter regulation Figure 4 illustrates the linking together I of the change-over valve f and the actuating e ear Z which controls the n'iovable guide blades of the blower.

lVhat we claim is 5 1. In a power installation, in con'ibinatiou, separate engines a container, separately driven blowers, means for connecting the respective blowers to serve the engines separately or COllQC'tlVQlf', and means for connect- 1 ing the blowers to serve the container in series.

2. In blower apparatus, in combination, separately driven blowers each having an inlet and an outlet, means for connecting the 5 blowers in series, and means operable by the 'n'eli1ninary blower for closing" the inlet of the lead ing blower.

3. In combination, apparatus for utilizing fluid under pressure a plurality of fluid-presso sure supply devices, second apparatus for utilizing fluid under pressure, and means operable to provide for parallel-operation of said devices with respect to the first apparatus to supply the same with fluid under pressure or :5 to provide for series-operation of said devices with respect to the second apparatus to supply the same with fluid under pressure.

l. In combination, internal combustion apparatus utilizing fluid under pressure a plu- YIG rality of fluid-pressure supply devices, second apparatus for utilizing fluid under pressure, and means operable to provide for paralleloperation of said devices with respect to the first apparatus to supply the sa w th fluid under pressure to the exclusion of the second apparatus or to provide for series-operation of said devices with respect to the second apparatus to supply the same with fluid under pressure to the exclusion oi the first apparatus.

5. in combination, a plurality of internal combustion engines utilizing fluid uuler pres sure. a plurality of fluid-pr ssure supply devices, second apparatus for utilizing fluid under pressure, and means operable o provide for selective or parallel-operation of said devices with respect to said e I ncs to supply the same with fluid under pressure to the exclusion of the second apparatus or 50 to provide for series-operation of said devices with respect to the second apparatus to supply the same with fluid under pressure to the exclusion of said engines.

In testimony whereof we have signed our names to this specification.

EMIL KLINGELFUSS. ADOLF BA-UMANN. 

